Text Diff
Compare two texts and highlight differences
Text Diff is a free online tool from BrowserUtils that compare two texts and highlight differences. It runs entirely in your browser — your data never leaves your device. No account required.
Enter text in both panels to see differences
How to use Text Diff
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Text Diff
Free online text diff tool. Compare two blocks of text side by side and see additions, deletions, and changes highlighted. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Text Diff specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript String, Intl.Segmenter, and RegExp APIs with full Unicode support
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How does the text diff tool work?
The tool compares two blocks of text line by line using a diff algorithm. Added lines are highlighted in green, removed lines in red, and unchanged lines are shown for context so you can quickly spot every difference.
Can I use this to compare code files?
Yes, the diff tool works with any plain text including source code. Paste the contents of two file versions to see exactly which lines were added, removed, or modified between them.
Is the text diff comparison case-sensitive?
Yes, the comparison is case-sensitive by default. "Hello" and "hello" will be flagged as different lines.
Does the text diff tool send my data to a server?
No, the diff computation runs entirely in your browser. Both text inputs remain on your device and are never transmitted anywhere.
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